@article{fdi:010072871,
  title = {{S}oil carbon stock changes in tropical croplands are mainly driven by carbon inputs : a synthesis},
  author = {{F}ujisaki, {K}enji and {C}hevallier, {T}iphaine and {C}hapuis {L}ardy, {L}ydie and {A}lbrecht, {A}lain and {R}azafimbelo, {T}. and {M}asse, {D}ominique and {N}dour, {Y}. {B}. and {C}hotte, {J}ean-{L}uc},
  editor = {},
  language = {{ENG}},
  abstract = {{S}oil organic carbon ({SOC}) balance is an important component of the terrestrial carbon ({C}) budget. {H}owever, effect of cropland management changes on {SOC} dynamics has not been recently assessed in the tropics. {S}tudies were compiled in the tropics where {SOC} stocks were measured in the topsoil (0-20 or 0-30 cm depth) after the adoption of management practices that are expected to enhance {SOC} stocks, including tillage reduction, crop rotation, exogenous organic amendments, restitution of crop residues, mineral amendments, and combinations of these practices. {R}andom forest regression was used to identify the determinants of {SOC} accumulation rates ({ASOC}) depending on the climate, soil characteristics and changes in management practices. 214 cases were identified in 48 studies in 13 different countries. {T}he average {ASOC} was 0.41 +/- 0.03 {M}g {C} ha(-1) yr(-1) (significantly greater than zero), for an average experiment duration of 13.6 +/- 0.6 years. {A}lthough a large part of the variability remained unexplained due to methodological bias in the studies or a lack of relevant predictors. {T}he strongest predictors of {ASOC} were {C} inputs, duration of the experiments, and the management practices, whereas neither soil characteristics (soil type, clay content, and initial {SOC} stock) nor climate variables (mean annual temperature and rainfall, aridity index) affected {ASOC}. {T}he {SOC} accumulation rates increased linearly with {C} inputs, and the conversion rate of {C} inputs to {SOC} was 8.2 +/- 0.8%. {G}iven the competing uses of organic matter on many tropical farms, the benefits of using changes in management practices for climate change mitigation might be overrated. {A}s {ASOC} decreased with the duration of the experiments, {ASOC} would probably be smaller if a period of 20 years were considered, as recommended by the {IPCC} guidelines. {T}he management practice with the greatest {ASOC} was diversified crop rotation. {C}ropping systems where diverse practices were combined resulted in higher {ASOC} than individual practices such as reduced tillage and mineral fertilization on their own. {T}he adoption of improved management practices that increase {C} inputs is still relevant for meeting the challenges of food security and adaptation to climate change.},
  keywords = {{S}oil organic carbon ; {T}ropical ; {SOC} stocks ; {C}arbon sequestration ; {C}ropland management ; {R}andom forest ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{A}griculture {E}cosystems and {E}nvironment},
  volume = {259},
  numero = {},
  pages = {147--158},
  ISSN = {0167-8809},
  year = {2018},
  DOI = {10.1016/j.agee.2017.12.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072871},
}